Multicellular organisms have a division of labour. Explain.
In unicellular organisms, there is no division of labour. The single cell of the organisms is capable of performing all the vital activities of life i.e., respiration, movement, digestion and reproduction, etc. Respiration, nutrition, and excretion in most of these unicellular organisms takes place through the general body surface. No special organs for these are present in them because they are too small to need them. Most of these unicellular organisms reproduce by simple binary division, to maintain their continuity. However, in some, sexual reproduction has also been observed.
